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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls;





type
  THaus=Class(TObject)
    Private
    FWidth, FHeight:Integer;
    FColor:TColor;
    FOrigin:TPoint;
    Public
    Constructor Create;
    Property Color:TColor read FColor Write FColor;
    Property Height:Integer read FHeight Write FHeight;
    Property Width:Integer read FWidth Write FWidth;
    Property Origin:TPoint read FOrigin write FOrigin;
    Procedure Paint(Canvas:TCanvas);
  End;


  TForm1 = class(TForm)
    Image1: TImage;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ THaus }

constructor THaus.Create;
begin
   Width := 100;
   Height := 100;
   Color := clBlue;
end;

procedure THaus.Paint(Canvas:TCanvas);
begin
    Canvas.Pen.Color := FColor;
    Canvas.Rectangle(  FOrigin.X
                     , FOrigin.Y +  (Height div 2)  // Platz für das Dach lassen
                     , FOrigin.X + Width
                     , FOrigin.Y +  (Height div 2) + Height
                     );
   Canvas.MoveTo(FOrigin.X, FOrigin.Y +  (Height div 2));
   Canvas.LineTo( FOrigin.X + (Width div 2), FOrigin.Y);
   Canvas.LineTo( FOrigin.X + Width, FOrigin.Y +  (Height div 2));
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  p:TPoint;
begin
  With THaus.Create do
    begin
      Paint(image1.Canvas);
      p.X := 100;
      p.Y := 120;
      Origin:=p;
      Color := clRed;
      Width := 50;
      Paint(image1.Canvas);
      Free;

    end;
end;

end.